Buy-side x402/HTTP-402 paying-fetch client for AI agents, under operator-owned spending policy (caps, allow/deny, human approval, trust checks, local receipts). Non-custodial.

Coinbase AgentKit action-provider adapter for payfetch — exposes paying-fetch under the operator's spending policy as AgentKit actions. Non-custodial; the agent cannot widen its own spending limits.

Vercel AI SDK tool adapter for payfetch — exposes paying-fetch under the operator's spending policy as AI SDK tools. Non-custodial; the agent cannot widen its own spending limits.

Pre-payment quality guard for x402 agents — blocks spend to services Assay rates 'avoid', backed by real paid probes with on-chain receipts.

Vercel AI SDK tools for Agent402.Tools: turn its catalog - 500+ strong: 400+ x402 pay-per-call tools + 100+ skill packs (browser, web search, OCR, PDFs, memory) - into AI SDK tools via four meta-tools (find/route/call/about), plus the cross-seller x402 Sm

Google ADK (Agent Development Kit) tools for Agent402.Tools: turn its catalog - 500+ strong: 400+ x402 pay-per-call tools + 100+ skill packs - into ADK FunctionTool instances via four meta-tools (find/route/call/about), with auto-payment (proof-of-work fr

Payer-side x402 client for Parallel Protocol — wraps fetch so a 402 challenge is paid automatically; the agent only needs a funded wallet

LangChain.js tools for Agent402.Tools: turn its catalog - 500+ strong: 400+ x402 pay-per-call tools + 100+ skill packs (browser, web search, OCR, PDFs, memory) - into LangChain tools via four meta-tools (find/route/call/about), plus the cross-seller x402

OpenAI Agents SDK tools for Agent402.Tools: turn its catalog - 500+ strong: 400+ x402 pay-per-call tools + 100+ skill packs (browser, web search, OCR, PDFs, memory) - into Agent tools via four meta-tools (find/route/call/about), plus the cross-seller x402

TypeScript payment rail for X402 + pr402 exact flow — fetch wrapper and Solana signing helpers

Auto-paying fetch for Stellar x402 and MPP challenges, with spend limits.